MultiProcessor.Factory

public static interface MultiProcessor.Factory

Factory for creating new tracker instances. As new items are detected, each distinct item
(as indicated by an item ID generated by the detector) will have a new instance of the
tracker created for that item. A tracker will receive all notifications for that item for
consecutive frames, until the item has been determined to be no longer present.

When onDone()
is called on a tracker instance, no future notifications will be sent to that instance.
Associated resources, if any, should be freed upon receiving that call.